//----------------------------------------------
//            NGUI: Next-Gen UI kit
// Copyright © 2011-2016 Tasharen Entertainment
//----------------------------------------------

using UnityEngine;

/// <summary>
/// Tween the object's position.
/// </summary>

[AddComponentMenu("Tween/Tween Position")]
public class TweenPosition : UITweener
{
	public Vector3 from;
	public Vector3 to;

	//[HideInInspector]
	//public bool worldSpace = true;

	Transform mTrans;

	public Transform cachedTransform { get { if (mTrans == null) mTrans = transform; return mTrans; } }
    

	/// <summary>
	/// Tween's current value.
	/// </summary>

	public Vector3 value
	{
		get
		{
            //return worldSpace ? cachedTransform.position : cachedTransform.localPosition;
            return cachedTransform.localPosition;
        }
		set
		{
            //if (worldSpace)
            //{
            //	if (worldSpace) 
            //                 cachedTransform.position = value;
            //	else
            //                 cachedTransform.localPosition = value;
            //}	
            cachedTransform.localPosition = value;
        }
	}


	/// <summary>
	/// Tween the value.
	/// </summary>

	protected override void OnUpdate (float factor, bool isFinished) { value = from * (1f - factor) + to * factor; }

	/// <summary>
	/// Start the tweening operation.
	/// </summary>

	static public TweenPosition Begin (GameObject go, float duration, Vector3 pos)
	{
		TweenPosition comp = UITweener.Begin<TweenPosition>(go, duration);
		comp.from = comp.value;
		comp.to = pos;

		if (duration <= 0f)
		{
			comp.Sample(1f, true);
			comp.enabled = false;
		}
		return comp;
	}

	///// <summary>
	///// Start the tweening operation.
	///// </summary>

	//static public TweenPosition Begin (GameObject go, float duration, Vector3 pos)
	//{
	//	TweenPosition comp = UITweener.Begin<TweenPosition>(go, duration);
	//	//comp.worldSpace = worldSpace;
	//	comp.from = comp.value;
	//	comp.to = pos;

	//	if (duration <= 0f)
	//	{
	//		comp.Sample(1f, true);
	//		comp.enabled = false;
	//	}
	//	return comp;
	//}

	[ContextMenu("Set 'From' to current value")]
	public override void SetStartToCurrentValue () { from = value; }

	[ContextMenu("Set 'To' to current value")]
	public override void SetEndToCurrentValue () { to = value; }

	[ContextMenu("Assume value of 'From'")]
	void SetCurrentValueToStart () { value = from; }

	[ContextMenu("Assume value of 'To'")]
	void SetCurrentValueToEnd () { value = to; }
}
